Nickel production from laterites using electro metal electrowinning (EMEW) process

Laterite with low-grade nickel (< 0.5%) was very difficult to process using pyrometallurgy technique. One method which able to process this laterite is solvent extraction process. This process also able to separate cobalt from nickel solutions. The aqueous phase of solvent extraction process whic...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-02, Vol.478 (1), p.12016
Main Authors: Sudibyo, Junaedi, A, Handoko, A S, Amin, M, Sumardi, S, Mufakhir, F R, Nurjaman, F, Tandoko, A H, Supriyatna, Y I
Format: Article
Language:English
Subjects:
Electrowinning
Hydrometallurgy
Laterites
Nickel
Pyrometallurgy
Solvent extraction
Solvent extraction processes
Sulfuric acid
Taguchi methods
Toluene
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Summary:Laterite with low-grade nickel (< 0.5%) was very difficult to process using pyrometallurgy technique. One method which able to process this laterite is solvent extraction process. This process also able to separate cobalt from nickel solutions. The aqueous phase of solvent extraction process which has a high nickel content able to collect using electrowinning methods. Electrometal-electrowinning (EMEW) method is one of the electrowinning methods which has better performance to collect metal from solution. In this work, laterite was leached using H2SO4 then was extracted using Cyanex 272 in toluene as an organic solvent. In this research, the effect of a voltage, a duration time of operation, a concentration of boric acid and a temperature on EMEW process were studied and were optimized using Taguchi method.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/478/1/012016